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/*******************************************************************************
* Copyright (c) 2011-2012 Ericsson, Ecole Polytechnique de Montreal and others
*
* All rights reserved. This program and the accompanying materials are made
* available under the terms of the Eclipse Public License v1.0 which
* accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors: Matthew Khouzam - Initial API and implementation
* Contributors: Simon Marchi - Initial API and implementation
*******************************************************************************/
package org.eclipse.linuxtools.ctf.core.event.types;
import java.util.LinkedList;
import java.util.List;
/**
* <b><u>EnumDeclaration</u></b>
*/
public class EnumDeclaration implements IDeclaration {
// ------------------------------------------------------------------------
// Attributes
// ------------------------------------------------------------------------
private final EnumTable table = new EnumTable();
private IntegerDeclaration containerType = null;
// ------------------------------------------------------------------------
// Constructors
// ------------------------------------------------------------------------
public EnumDeclaration(IntegerDeclaration containerType) {
this.containerType = containerType;
}
// ------------------------------------------------------------------------
// Getters/Setters/Predicates
// ------------------------------------------------------------------------
public IntegerDeclaration getContainerType() {
return containerType;
}
@Override
public long getAlignment() {
return this.getContainerType().getAlignment();
}
// ------------------------------------------------------------------------
// Operations
// ------------------------------------------------------------------------
@Override
public EnumDefinition createDefinition(IDefinitionScope definitionScope,
String fieldName) {
return new EnumDefinition(this, definitionScope, fieldName);
}
public boolean add(long low, long high, String label) {
return table.add(low, high, label);
}
public String query(long value) {
return table.query(value);
}
public String getLabel(long i) {
return table.getLabel(i);
}
/*
* Maps integer range -> string. A simple list for now, but feel free to
* optimize it. Babeltrace suggests an interval tree.
*/
static private class EnumTable {
List<Range> ranges = new LinkedList<Range>();
public EnumTable() {
}
public String getLabel(long i) {
for (Range r : ranges) {
if (r.intersects(i)) {
return r.str;
}
}
return null;
}
public boolean add(long low, long high, String label) {
Range newRange = new Range(low, high, label);
for (Range r : ranges) {
if (r.intersects(newRange)) {
return false;
}
}
ranges.add(newRange);
return true;
}
public String query(long value) {
for (Range r : ranges) {
if (r.intersects(value)) {
return r.str;
}
}
return null;
}
static private class Range {
long low, high;
String str;
public Range(long low, long high, String str) {
this.low = low;
this.high = high;
this.str = str;
}
public boolean intersects(long i) {
return (i >= this.low) && (i <= this.high);
}
public boolean intersects(Range other) {
return this.intersects(other.low)
|| this.intersects(other.high);
}
}
}
@Override
public String toString() {
/* Only used for debugging */
return "[declaration] enum[" + Integer.toHexString(hashCode()) + ']'; //$NON-NLS-1$
}
}
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